It's a bad idea. As a profile forms, the enemy switches tactics. They just need to get blond haired, blue-eyed Muslim converts to do their bidding. They are already doing this, in fact. Same with babies and the elderly. As soon as we stop checking any group of people, they will become the next carriers, victims of evil people who don't mind killing anyone to do their nefarious deeds.
Abut 20 years ago, the Israelis stopped a redheaded, pregnant Irish woman from getting on a plane with a bomb that her Palestinian boyfriend put into her luggage.
I disagree.
First, if intelligent searching for a terrorist's tools of destruction continue, then we have at least the same degree of security as now.
Second, there simply aren't as many "blond-haired, blue-eyed", or other non-traditional, terrorists to be found. By definition, zeroing in on the overwhelmingly most common terrorists, the threat will be significantly reduced.
The fact is, we know who the terrorists are most likely to be (Middle-eastern Muslim young adult males) and we know their most likely tools and tactics (Explosives, knives, hijacking, kidnapping).
If the govt. would quit wasting monumental quantities of time and money keeping up P.C. appearances and instead zero in on the obvious real threat, we'd all be much safer.
So search all persons from the Islamic world plus a random selection of others.